/*

 * Licensed to the Apache Software Foundation (ASF) under one

 * or more contributor license agreements.  See the NOTICE file

 * distributed with this work for additional information

 * regarding copyright ownership.  The ASF licenses this file

 * to you under the Apache License, Version 2.0 (the

 * "License"); you may not use this file except in compliance

 * with the License.  You may obtain a copy of the License at

 *

 *     http://www.apache.org/licenses/LICENSE-2.0

 *

 * Unless required by applicable law or agreed to in writing, software

 * distributed under the License is distributed on an "AS IS" BASIS,

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

 * See the License for the specific language governing permissions and

 * limitations under the License.

 */

package com.bff.gaia.unified.sdk.extensions.sql.impl.utils;



import org.apache.calcite.rex.RexFieldAccess;

import org.apache.calcite.rex.RexInputRef;

import org.apache.calcite.rex.RexNode;



import java.io.Serializable;



/** SerializableRexNode. */

public abstract class SerializableRexNode implements Serializable {

  public static SerializableRexNode.Builder builder(RexNode rexNode) {

    return new SerializableRexNode.Builder(rexNode);

  }



  /** SerializableRexNode.Builder. */

  public static class Builder {

    private RexNode rexNode;



    public Builder(RexNode rexNode) {

      this.rexNode = rexNode;

    }



    public SerializableRexNode build() {

      if (rexNode instanceof RexInputRef) {

        return new SerializableRexInputRef((RexInputRef) rexNode);

      } else if (rexNode instanceof RexFieldAccess) {

        return new SerializableRexFieldAccess((RexFieldAccess) rexNode);

      }



      throw new UnsupportedOperationException(

          "Does not support to convert " + rexNode.getType() + " to SerializableRexNode.");

    }

  }

}